Matthew 24:6-7

You will continually hear of wars and rumors of wars. See that you are not frightened, for those things must take place, but that is not yet the end (of the age). For nation will rise against nation, and kingdom against kingdom, and there will be famines and earthquakes in various places.  

We may not know when Jesus is coming back, but we can be aware of the times. Jesus is very clear about what we are to look for and what will happen. It is often the closer a person gets to something, the more the details emerge. Jesus encourages us to keep our faith and keep strong in our hearts no matter what happens in the world.